Omron Smartstep

karlag · Nov 28, 2006

Hi evrebody, I am playing with Omron Smartstep R7D-Ap04 and 400w motor with max 3000r/min without dc brake. From PLC -instruction is-outputs a specified number of pulses at a set frequency-pulses train applied on the pin +CW. P200 set at cw,posit.log. Motor turns and perfectly responses when frequency changing. Electronic Gear setting is G1=4 G2=1 Encoder -1 rotation=2,000pulses .
Evrething looks nice when the motor turns at the low speed.
At the hi freq.(speed) motor shaft evretime stops at the different positions. What is wrong?
p.s. There is no load on the motor shaft.
Thank you!

Sergei Troizky · Nov 28, 2006

What PLC and what instruction are being used?

Karan01 · Nov 28, 2006

are you doing increment move or absolute move, if you doing increment move then you have to know how many pulse it takes for full turn.

seppoalanen · Nov 29, 2006

Have there some drive and if, what is max rpm setting, it could be 1500 and cant't rotate more? Consequence: pulse count error.

karlag · Nov 29, 2006

smartstep

to Sergei Troizky :
I can choose between Mitsub.Omron and Al-brad. bur I would prefer stay with Mitsub. Mits.FX1N- instruction PLSY (DPLSY actually).Today I gonna try PLSR instr.
Thank you!

to Karan01: It is the increment move .Encoder-bultin hase 2000 pulses/r.
Thank you!

to seppoalanen: The motor takes max 3000r/min=100KHz.
Thank you!

Sergei Troizky · Nov 29, 2006

Well, it looks that either:
- The movement is truncated by preliminary removal of the rung conditions.
Unlike AB and OMRON, in Mitsubishi the high-speed output instruction
is being executed only when the rung conditions are true.
or
- The frequency of PLSY is being changed during motion and goes out of valid range. It cannot be below 10Hz.

karlag · Nov 29, 2006

ok...this is the rung...I wrote it just for testing:

-----------dplsy(d10 d20 y0)
----------END

D10-SET FREQ
D20-# OF PULSES

THAT IS IT...
tHANKS!

karlag · Nov 29, 2006

-----| M10 |--------- Dplsy[d10 D20 Y0]
---------------------------end

Sergei Troizky · Nov 29, 2006

Is it entire test program, or something else controls M10?
If this is entire program and M10 stays On long enough, the stepper must stop in the same position.
Ensure that the top DIP-switch on the drive is in PARAMETER position.

karlag · Nov 29, 2006

WELL, M10-JUST TO START SYSTEM(SET FROM MITSYB. HMI AS WELL AS D10 AND D20)

Right now it looks like

---|m10|----DPLSY[K10000 K2000 Y0]

Motor stops according # of pulses (d20) 2000 pulses=1 rotation.
Could it happens couse shaft is not loaded and hase some inertia?
Thank you!

Sergei Troizky · Nov 29, 2006

No, it has nothing with load or inertia.
If the drive is not in error, it must maintain the set position.
And once again, M10 is NOT for START, it must be On during entire motion.
Are you using sinking or sourcing signal for steps?
Did you change an other numeric settings except G1/G2?

karlag · Nov 29, 2006

M10 always On during feeding pulses. I am using positiv logic(sink)
I did not change any other parametrs..
Thak you again

)))))))))))

Sergei Troizky · Nov 29, 2006

Then looks that you've got a hardware problem.
I have to see the schematics.
You can PM me.

karlag · Nov 29, 2006

it is simply:

PLC SIDE _________________________________DIVER SIDE
y0-----------|R= 3.3K|----------------------+CCW

V0----- +24v _________________-24V--------- -CCW

Sergei Troizky · Nov 30, 2006

Looks OK.
I have no more ideas. Is the drive new or used?

Omron Smartstep

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